Stop-block for knuckle-pins.



PATENTED AUG. 7, 1906.

- G. A. HART. STOP BLOCK FOR KNUCKLE PINS.

- AAAAAAAAAAA FILED APR. 2222 90 6.

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w 1 1 I I I 4,, ATTORNEY.

UNITED STATES PATENT OFF ICE.

eEoRcE A. HART, or MAYwooD, ILLINOIS. AssicNoR TO LATROBE sTEEL AND- COUPLER coMPANY, or cAMDEN, NEW JERSEY, A

CORPORATION OF NEW JERSEY.

STOP-BLOCK FOR KNUCKLE-PINS.

Specification of Letters Patent.

Patented Aug. 7, 1906-.

Application filed April 25,1906; Serial No. 313.562.

$0 at whom it may concern.-

Be it known that I,- GEORGE A. HART, a citizen of the United States of America, residing in Maywood, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Stop-Blocks for Knuckle-Pins, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to oar-couplers of the usual Master Oar-Builders type and provided with vertical pivot-pin holes adapted to receive the pivot-pin on which the knuckle of the coupler turns. In couplers of this kind it is not unusual to provide what is generally known as the stop-block below the pivot-pin hole and serving as a ledge which will prevent the pivot-pin from falling through the hole either as a whole, if it is made without a head, or in part in case the pin is broken in service. As heretofore constructed, however, these stop-blocks when in position for service have been of such a character as to interfere with and prevent the introduction of a drifting-tool from the lower end of the pivot-pin hole; and the main object of my invention is to provide a stopblock of such a character that while well adapted to serve the usual purposes of a stopblock it will not interfere with the introduction of the drifting-tool into the lower end of the pin-hole.

Further objects of my invention are to generally improve and strengthen the construction of such devices; and my invention in its broadest features consists in a couplerhead having a stop-finger or stop-block extending below the pivot-pin hole a distance short of the center thereof and of such a character as to permit of the introduction of the drifting-tool into the hole of the pin-hole.

By preference my stop-block is cast integral with the coupling-head and is formed with a stop-ledge extending below the pinhole in the form of an annular flange, and by preference also the downwardly-extending member of the stop finger or block which supports this annular flange is braced and stiffened by a laterally-extending rib.

Reference is now had to the drawings in which my invention is illustrated, and in which 7 Figure 1 is a plan View of a coupling-head provided with my improvement. Fig. 2 is a side elevation of a coupling-head, showing the pivot-pin in place. Fig. 3 is a bottom view of the rib of the head on which the stopblock is secured, and Fig. 4 is a cross-sectional view on the line 4 4 of Fig. 3.

A indicates the coupling-head, having the pivot-supporting arms A A in which arms are formed the pivot-pin hole or holes, (indicated at B B.)

O. is the usual headed pivot-pin; D, the downwardly-extending arm of the stop-block from the lower edge of which projects the stop ledge 0r flange E, preferably recessed on its front edge in segmental form, as indicated at F, and so that the portion extending below the pivot-pin hole is in the form of an annular ledge or flange.

G is the lateral brace or flange extending from the back of the downwardly-extending arm D and merging into, the bottom of the coupler.

I have indicated in dotted lines at H II the usual drifting-tool, the shaft thereof being indicated at H and the cutting edge thereof at H.

It will be seen that my stop-block, while extending below the pivot-pin hole to a sufflcient distance to serve as a ledge to support the pivot-pin in case of breaking or in the absence of a head, does not extend to the center of the pivot-pin hole and by its shape and conformation gives ready access to the drifting-tool H H, which can be used from the lower end of the coupler just as efliciently as if the stop-ledge were non-existent.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A coupler-head having a pivot-pin hole formed in it and a stopfmger extending below said hole to a distance short of the center 'thereof andso as to afford a support for a pivot-pin without interfering with the introduction of a drifting-tool into the pin-hole from the lower end thereof.

2. A coupler-head having a pivot-pin hole formed in it and a stop-finger extending below said hole in the form of a segmental flange to a distance short of the center thereof and so as to afford a support for a pivot-pin Without interfering with the introduction of a 5 drifting-tool into the pin-h01e from the lower end thereof.

3. A coupler-head having a pivot-pin hole formed in it and a stop-finger cast integral with the head and consisting of a down- 10 wardly-extending arm with a laterally-extending stop-ledge projecting from itsfend and forming a segmental flange projecting below but not to the center of the pin-hole, said downwardly-extending arm being braced by a laterally-extending Vertical flange.

GEORGE A. HART.

Witnesses:

J. H. Dom), JOSEPH WOLF 

